Seina Yamada has been waiting so long to return to his home, Earth.
But so much has changed; his sister is engaged to Kiriko's brother Kai,
and his parents' old store is now a huge mall.
Furthermore, he is to stay at Kiriko's mother's house...
That makes it simpler.
هذا يبسّط الأمر
Questo rende le cose più semplici.
Então já facilita as coisas.
Значит, всё пройдёт проще.